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            <h1 id="MVC"><a href="#MVC" class="headerlink" title="MVC"></a>MVC</h1><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// view</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">View</span>(<span class="params">controller</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> target = $(<span class="string">'#some-element'</span>)[<span class="number">0</span>]</span><br><span class="line">  <span class="keyword">this</span>.render = <span class="function"><span class="keyword">function</span> (<span class="params">model</span>) </span>&#123;</span><br><span class="line">    target.innerText = model.getValue()</span><br><span class="line">  &#125;</span><br><span class="line">  target.addEventListener(<span class="string">'click'</span>, controller.click)</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// model</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">Model</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> _value = <span class="number">0</span></span><br><span class="line">  <span class="keyword">var</span> registerViews = []</span><br><span class="line">  <span class="keyword">this</span>.register = <span class="function"><span class="keyword">function</span> (<span class="params">viewInstance</span>) </span>&#123;</span><br><span class="line">    registerViews.push(viewInstance)</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">this</span>.notify = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">var</span> self = <span class="keyword">this</span></span><br><span class="line">    registerViews.forEach(<span class="function"><span class="keyword">function</span> (<span class="params">viewInstance</span>) </span>&#123;</span><br><span class="line">      viewInstance.render(self)</span><br><span class="line">    &#125;)</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">this</span>.add = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    _value += <span class="number">1</span></span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">this</span>.getValue = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> _value</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// controller</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">Controller</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> model, view</span><br><span class="line">  <span class="keyword">this</span>.init = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    model = <span class="keyword">new</span> Model()</span><br><span class="line">    view = <span class="keyword">new</span> View(<span class="keyword">this</span>)</span><br><span class="line">    model.register(view)</span><br><span class="line">    model.notify()</span><br><span class="line">    setTimeout(<span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">      view.render(&#123; <span class="attr">getValue</span>: <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123; <span class="keyword">return</span> <span class="number">1000</span> &#125; &#125;)</span><br><span class="line">    &#125;, <span class="number">1000</span>)</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">this</span>.click = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    model.add()</span><br><span class="line">    model.notify()</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// 调用</span></span><br><span class="line"><span class="keyword">var</span> controller = <span class="keyword">new</span> Controller()</span><br><span class="line">controller.init()</span><br></pre></td></tr></table></figure>

<p><strong>总结</strong></p>
<ol>
<li>mvc模式中model层可以直接通知view层重新渲染视图</li>
<li>仅由controller层发起model层的修改</li>
<li>代码的执行入口是controller</li>
<li>controller内部维护着model层和view层之间的关系——同步视图和数据</li>
<li>controller可以通过model层使view层重新渲染，也可以直接使view层重新渲染</li>
</ol>
<a id="more"></a>

<h1 id="MVP"><a href="#MVP" class="headerlink" title="MVP"></a>MVP</h1><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// view</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">View</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> target = $(<span class="string">"#some-element"</span>)[<span class="number">0</span>];</span><br><span class="line">  <span class="keyword">this</span>.init = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">const</span> presenter = <span class="keyword">new</span> Presenter(<span class="keyword">this</span>);</span><br><span class="line">    target.addEventListener(<span class="string">"click"</span>, presenter.click);</span><br><span class="line">  &#125;;</span><br><span class="line">  <span class="keyword">this</span>.render = <span class="function"><span class="keyword">function</span>(<span class="params">model</span>) </span>&#123;</span><br><span class="line">    target.innerText = model.getValue();</span><br><span class="line">  &#125;;</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// model</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">Model</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> _value = <span class="number">0</span>;</span><br><span class="line">  <span class="keyword">this</span>.add = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    _value += <span class="number">1</span>;</span><br><span class="line">  &#125;;</span><br><span class="line">  <span class="keyword">this</span>.getValue = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> _value;</span><br><span class="line">  &#125;;</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// presenter</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">Presenter</span>(<span class="params">view</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> model = <span class="keyword">new</span> Model();</span><br><span class="line">  view.render(model);</span><br><span class="line"></span><br><span class="line">  <span class="keyword">this</span>.click = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    model.add();</span><br><span class="line">    view.render(model);</span><br><span class="line">  &#125;;</span><br><span class="line">  setTimeout(<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    view.render(&#123;</span><br><span class="line">      getValue: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> <span class="number">1000</span>;</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;);</span><br><span class="line">  &#125;, <span class="number">1000</span>);</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// 调用</span></span><br><span class="line"><span class="keyword">var</span> view = <span class="keyword">new</span> View();</span><br><span class="line">view.init();</span><br></pre></td></tr></table></figure>

<p><strong>总结</strong></p>
<ol>
<li>MVP模式中model层很纯粹，仅修改和存储数据，在内部不与view层有牵连</li>
<li>仅由presenter层发起view层的重新渲染</li>
<li>仅由presenter层发起model层的修改</li>
<li>代码的执行入口是view</li>
<li>presenter内部维护着model层和view层之间的关系——同步视图和数据</li>
</ol>
<h1 id="MVVM"><a href="#MVVM" class="headerlink" title="MVVM"></a>MVVM</h1><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line"><span class="comment">// view</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">View</span>(<span class="params">vm</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> target = $(<span class="string">'#some-element'</span>)[<span class="number">0</span>]</span><br><span class="line">  <span class="keyword">this</span>.render = <span class="function"><span class="keyword">function</span> (<span class="params">model</span>) </span>&#123;</span><br><span class="line">    target.innerText = model.getValue()</span><br><span class="line">  &#125;</span><br><span class="line">  target.addEventListener(<span class="string">'input'</span>, vm.input)</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// model</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">Model</span>(<span class="params">vm</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> _value = <span class="number">0</span></span><br><span class="line">  <span class="keyword">var</span> data = &#123;&#125;</span><br><span class="line">  <span class="built_in">Object</span>.defineProperty(data, <span class="string">'value'</span>, &#123;</span><br><span class="line">    <span class="keyword">get</span>: function () &#123; <span class="keyword">return</span> _value &#125;,</span><br><span class="line">    <span class="keyword">set</span>: function (nextValue) &#123;</span><br><span class="line">      vm.notify(nextValue)</span><br><span class="line">      _value = nextValue</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;)</span><br><span class="line">  <span class="keyword">this</span>.change = <span class="function"><span class="keyword">function</span> (<span class="params">nextValue</span>) </span>&#123;</span><br><span class="line">    data.value = nextValue</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">this</span>.getValue = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> _value</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// viewmodel</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">ViewModel</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> model, view, needRespond = <span class="literal">true</span></span><br><span class="line">  <span class="keyword">this</span>.init = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    view = <span class="keyword">new</span> View(<span class="keyword">this</span>)</span><br><span class="line">    model = <span class="keyword">new</span> Model(<span class="keyword">this</span>)</span><br><span class="line">    view.render(model)</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">this</span>.input = <span class="function"><span class="keyword">function</span> (<span class="params">e</span>) </span>&#123;</span><br><span class="line">    model.change(e.target.value)</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">this</span>.notify = <span class="function"><span class="keyword">function</span> (<span class="params">nextValue</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">if</span> (needRespond) &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">'new value:'</span>, nextValue)</span><br><span class="line">      view.render(model)</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// 调用</span></span><br><span class="line"><span class="keyword">var</span> vm = <span class="keyword">new</span> ViewModel()</span><br><span class="line">vm.init()</span><br></pre></td></tr></table></figure>

<p><strong>总结</strong></p>
<ol>
<li>MVVM模式中model层和view层通过viewmodel层关联，通过viewmodel层同步视图和数据</li>
<li>仅由viewmodel层发起view层的重新渲染</li>
<li>view层的修改可以被viewmodel层感知到</li>
<li>model层的修改可以被viewmodel层感知到</li>
<li>代码的执行入口是viewmodel</li>
</ol>

        
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